667564530 has 16 divisors (see below), whose sum is σ = 1602154944. Its totient is φ = 178017200.

The previous prime is 667564519. The next prime is 667564537. The reversal of 667564530 is 35465766.

It is not an unprimeable number, because it can be changed into a prime (667564537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11126046 + ... + 11126105.

It is an arithmetic number, because the mean of its divisors is an integer number (100134684).

Almost surely, 2^667564530 is an apocalyptic number.

667564530 is an abundant number, since it is smaller than the sum of its proper divisors (934590414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667564530 is a wasteful number, since it uses less digits than its factorization.

667564530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22252161.

The product of its (nonzero) digits is 453600, while the sum is 42.

The square root of 667564530 is about 25837.2701731433. The cubic root of 667564530 is about 873.9724667408.

The spelling of 667564530 in words is "six hundred sixty-seven million, five hundred sixty-four thousand, five hundred thirty".